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Heat pumps and buildings energy efficient heating and cooling.

Number: pap. n. 9

Author(s) : HALOZAN H.

Summary

European governments have committed to significantly reduce the carbon footprint of new and existing homes. It is therefore generally accepted that: increasing the uptake of renewable energy systems and improving the thermal performance of both new and existing homes is critical if Europe is to achieve ambitious emission targets. Heat pumps offer the possibility of reducing energy consumption significantly, mainly in the building sector. Taking different applications of heat pumping technologies several items have to be taken into consideration like drive energy, design of the unit, integration into a system and the control strategy. The efficiency of the unit commonly expressed by the COP, the coefficient of performance. This COP depends on the refrigerant selected and on the components used like the compressor, the size and the design of condenser and evaporator, the flow sheet – single stage, two stage, economiser or cascade – and the internal cycle control. The choice of the refrigerant is most commonly a compromise between efficiency and cost, smaller equipment using a high-pressure working fluid can reduce the cost, a working fluid with low discharge temperatures can avoid a two-stage system. With highly efficient systems the advantages of thermodynamic heating and cooling can be demonstrated and used for reducing the energy demand significantly. Heat pumps are one of the key technologies for energy conservation, increasing the share of renewable energy used and reducing CO2 emissions.

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Pages: 8 p.

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Details

  • Original title: Heat pumps and buildings energy efficient heating and cooling.
  • Record ID : 30008718
  • Languages: English
  • Source: Compressors 2013: 8th International Conference on Compressors and Coolants.
  • Publication date: 2013/09/02

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